Most anglers have a Copper John or two rolling around the fly box. Some have entire rows dedicated to this workhorse of a nymph. There's a reason why: fish can't seem to resist the glinting body and simple profile. The splayed biot tail and tungsten bead head seem to get the job done when the fish are snubbing fancier flies. This version is tied on a tactical jig hook—barbless with a claw point.